(57) The invention relates to an automatic level control circuit comprising an analog-to-digital
(AD) converter (4) for discriminating an input signal with respect to a plurality
of reference levels to produce a decoded digital signal and an error digital signal,
and a reference voltage generator (6) responsive to said decoded digital signal and
said error digital signal for providing a reference voltage to said A4 converter (4),
said reference levels being controlled to optimum ones responsive to a variation in
the level of said input signal. The circuit is practable and simple in construction.
(Fig. 3).
|
|
